Finding the Fourth Proportional to 2,139.25, 2,952.17 and 1,207.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.25 : 2,952.17 = 1,207.93 : x
2. Step 2: Convert to fraction form
   2,139.25/2,952.17 = 1,207.93/x
3. Step 3: Cross multiply
   2,139.25x = 2,952.17 × 1,207.93
4. Step 4: Simplify right side
   2,139.25x = 3,566,014.71
5. Step 5: Solve for x
   x = 3,566,014.71/2,139.25
6. Step 6: Final answer
   x = 1,666.95